diff --git a/examples/graphs/drop-graph.R b/examples/graphs/drop-graph.R
new file mode 100755
index 0000000..0f28f6e
--- /dev/null
+++ b/examples/graphs/drop-graph.R
@@ -0,0 +1,30 @@
+#!/usr/bin/env Rscript
+# Copyright (c) 2012-2013  Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+
+
+# install.packages ('ggplot2')
+library (ggplot2)
+## # install.packages ('scales')
+## library (scales)
+
+#########################
+# Rate trace processing #
+#########################
+data = read.table ("drop-trace.txt", header=T)
+data$Node = factor (data$Node)
+data$Kilobits <- data$Kilobytes * 8
+data$Type = factor (data$Type)
+
+## data.rtr = data[grep("Rtr", data$Node),]
+
+# graph rates on all nodes in Kilobits
+g.all <- ggplot (data, aes (x=Time, y=Kilobits, color=Type)) +
+  geom_point (size=2) +
+  geom_line () +
+  ylab ("Packet drop rate [Kbits/s]") +
+  facet_wrap (~ Node) +
+  theme_bw ()
+
+png ("drop-trace-all-nodes.png", width=800, height=500)
+print (g.all)
+x = dev.off ()
diff --git a/examples/wscript b/examples/wscript
index b21629e..af34ee6 100644
--- a/examples/wscript
+++ b/examples/wscript
@@ -42,6 +42,9 @@
         obj = bld.create_ns3_program('ndn-tree-app-delay-tracer', ['ndnSIM'])
         obj.source = 'ndn-tree-app-delay-tracer.cc'
 
+        obj = bld.create_ns3_program('ndn-tree-with-l2tracer', ['ndnSIM'])
+        obj.source = 'ndn-tree-with-l2tracer.cc'
+
     obj = bld.create_ns3_program('ndn-simple-pit-policies', ['ndnSIM'])
     obj.source = 'ndn-simple-pit-policies.cc'